Cutting apparatus.



Patented ,Oct. 6, 1908.

G. KLINGENBERG.

CUTTING APPARATUS.

APPLICATION rum) MAR. 2a, 1908.

r. b. WZ f n n F w IT n r n C- W? En 2s ses UNITED STATES PATENT OFFICE.

CHRISTIAN KLINGENBERG, OF TOLEDO, OHIO, ASSIGNOR TO THE LIBBEY GLASS COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

OUTllIEIlJ' G APPARATUS.

Specification of Letters Patent.

Patented Oct. 6, 1908.

Application filed latch 28, 1908. 'Serial No. 423,963.

wheel to form a cutter thereof being more,

particularly adapted for use in glass cuttin It is the object of the invention to provi e automatic means for collecting, purifying and returning the abrasive material so that the samematerial may be repeatedly used for cutting.

To this end the invention consists in the construction as hereinafter set forth.

In the drawin sFigure 1 is a vertical 'Jngitudinal section through the machine; "ig. 2 is a side elevation, partly in section; aid Fig. 3 is a horizontal section through the elevator. I

My improvement is applicable to any of the ordinary constructions of grinders, such for instance as illustrated, in which A is a grinder wheel. y

B is a hopper above-the wheel for containing the abrasive material, such as silica sand, and from which a stream of this material is fed to the wheel A. I

C is a receptacle beneath the wheel A for collecting the abrasive material discharged from the wheel, as well as the ground material from the work. 4

The material which collects in the receptacle C is a mixture of the unused abrasive material discharged from the wheel, finely pulverized abrasive material and the glass dust or grindings from the work. This mixture would not be suitable for reuse in grinding and it is therefore necessary to eliminate the ulverized abrasive material and the grindings. This I preferably accomplish by a water separation and preferably by the construction shown in which D is an inclined chute forming an extension of 'the receptacle C.

E is a nozzle from which the stream of water is discharged across the chute D in an upward direction and inclined contrary to the direction of travel of the material in the chute. This jet of water will cause-a separation of the finer particles from the unbroken abrasive material, permitting the latter to continue its course down the trough D in the lower portion thereof, while the fine material is raised to the top and floats as a scum above the other material.

By the construction just described, the abrasive material suitable .for reuse is purified, but it is a further object of my invention to automatically return this material to the hop er B. As shown, this is accomplished y means of an elevator F which raises the material discharged from the trough D to a point slightly higher than the hopper B, and then discharges it through a chute G into said hopper. On account of the abrasive nature of the material to be handled it is necessary to rovide an elevator or conveyer which Wlll not itself be destroyed by the material. As shown, the elevator F comprises an endless belt or chain H, which runs over pulleys or sprockets I adjacent to a tubular casing J. To this endless belt is attached a bucket K, and preferably a plurality of these buckets, adapted to travel within the tubular casing J. The attachment between the buckets K and the belt H consists of a shank L so shaped that it will pass into a longitudinal slot M in the casing J, and within this casing is an annular portion L rigid with or integrally secured to the shank. The buckets K are preferably formed of a porous fabric, such as canvas, secured to the annular member L and formin a bag or cup which will scoo up the abraslve material, but will permit the water to drain ofl. Thus the movement of the belt H will cause the buckets to successively elevate the material, and at the upper end of the casing these buckets are reversed to discharge the material into the trough or chute G.

The construction of the buckets above described is important, inasmuch as cups formed of rigid material would soon fill up with the abrasive which. would adhere to the inner surface of the cup, and would be carried down again in the return leg of the conveyer. Such a result is avoide by the use of buckets of canvas or other flexible material which, upon reversal, will separate from the abrasive and permit the latter to drop into the chute G.

The water for the jet'from the nozzle E may be furnished from any suitable source of supply but, as shown, it is drawn from the upper portion of the hopper B and passes through a conduit 0 to the nozzle. This produces an unvarying pressure which will give a constant and predetermined velocity to the jet by producing uniform results in separation. The washed out fine material is discharged at suitable points, such as through the aperture P in the lower portion of the conveyer easing E.

What 1. claim as my invention is:

1. The combination with a grinder, of an elevator for returning the abrasive material discharged therefrom comprising a slitted tubular casing, to but outside of said casing, a bucket within said casing and a support shank for said bucket passing out through the slit in said casing and secured to said conveyer.

2. The combination with a grinder, of an elevator for returning the abrasive material discharged therefrom comprising a slitted tubular easing, a conveyer belt adjacent to but outside said casing, a shank secured to said conveyer projecting inward through the slit in said casing, and a cup or bucket of flexible material secured to said shank within said casing.

33. The combination with a rotary grinder, of a supply receptacle for the abrasive material thereabove, a receiving receptacle for the discharged abrasive material and grindings therebeneath, automatic means for purifying the discharged abrasive material and means for returning the same to the supply an endless 'conveyer adjacent receptacle comprising a slitted tubular easing, an endless conveyer adjacent to but outside of said casing, a bucket within said casing and a support shank for said bucket passing out through the slit in said casing and secured to said conveyer. I

4. The combination with a rotary grinder, of a supply receptacle for the abrasive material thereabove, a receiving receptacle for the discharged abrasivematerial and grindings therebeneath, automatic means to purifying the discharged abrasive material, comprising a water supply and a nozzle connected therewith and inclined contrary to the direction of travel of the material in the receiving receptacle, and means for returning the purified material to the supply receptacle.

5. The combination with a rotary grinder, of a supply receptacle for the abrasive material thereabove, a chute for the discharged abrasive material and grindings therebeneath, automatic means for purifying the discharged abrasive material therebeneath, comprising a conduit connected with the supply receptacle, a nozzle attached to said conduit and inclined contrary to the travel of the material in said discharge chute, and means for returning the purified material to the supply receptacle.

In testimony whereof I atiix my signature in presence of two witnesses.

CHRISTIAN KLINGENBERG.

Witnesses:

W. F. DONOVAN, F. E. WHITMORE. 

